AskDefine | Define femur

Dictionary Definition

femur n : the longest and thickest bone of the human skeleton; extends from the pelvis to the knee [syn: thighbone, femoris] [also: femora (pl)]

User Contributed Dictionary



From etyl la femur.



  1. In the context of "anatomy": A thighbone.
  2. A segment of an insect’s leg.

Derived terms


segment of insect’s leg
  • Finnish: reisi



femur, femoris

Extensive Definition

The femur is the thigh bone. In humans, it is the longest, most voluminous, and strongest bone. The average human femur is 48 centimeters (19 in) in length and 2.34 cm (0.92 in) in diameter and can support up to 30 times the weight of an adult. It forms part of the hip (at the acetabulum) and part of the knee.
The word femur is Latin for thigh. Theoretically in strict usage, femur bone is more proper than femur, as in classical Latin femur means "thigh", and os femoris means "the bone within it".
In medical Latin its genitive is always femoris, but in classical Latin its genitive is often feminis, and should not be confused with case forms of femina, which means "woman".

Intercondylar Fossa

The intercondylar fossa is present between the condyles at the distal end of the femur. In addition to the intercondylar eminence on the tibial plateau, there is both an anterior and posterior intercondylar fossa (area), the sites of anterior cruciate and posterior cruciate ligament attachment, respectively.

In other animals

Parallel structures by the same name exist in other complex animals, such as the bone inside a ham or a leg of lamb. The name femur is also given to the most proximal full-length jointed segment of an arthropod's leg.


For example, the femur of a dog is located at the bottom of the color bone.

Additional images

Image:Knee diagram.png|Knee diagram Image:Gray432 color.png|Cross-section through the middle of the thigh.
femur in Czech: Stehenní kost
femur in Danish: Lårbensknogle
femur in German: Oberschenkelknochen
femur in Spanish: Fémur (anatomía humana)
femur in Esperanto: Femurosto
femur in French: Fémur
femur in Classical Chinese: 股骨
femur in Indonesian: Tulang paha
femur in Italian: Femore
femur in Hebrew: עצם הירך
femur in Latin: Femur
femur in Lithuanian: Šlaunikaulis
femur in Dutch: Dijbeen
femur in Japanese: 大腿骨
femur in Norwegian: Femur
femur in Polish: Kość udowa
femur in Portuguese: Fêmur
femur in Russian: Бедренная кость
femur in Slovenian: Stegnenica
femur in Finnish: Reisiluu
femur in Swedish: Lårben
femur in Tamil: தொடையெலும்பு
femur in Telugu: తుంటి ఎముక
femur in Thai: กระดูกต้นขา
femur in Turkish: Femur
femur in Ukrainian: Стегнова кістка
femur in Walloon: Oxhea del coxhe
femur in Chinese: 股骨
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